-6(2k+1)=-90

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Solution for -6(2k+1)=-90 equation: 



-6(2k+1)=-90

We move all terms to the left:

-6(2k+1)-(-90)=0

We add all the numbers together, and all the variables

-6(2k+1)+90=0

We multiply parentheses

-12k-6+90=0

We add all the numbers together, and all the variables

-12k+84=0

We move all terms containing k to the left, all other terms to the right

-12k=-84

k=-84/-12

k=+7

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